Senior Nuclear Criticality Engineer

ABOUT THE ROLEJoin our dynamic team as a Senior Nuclear Criticality Engineer at the Uranium Processing Facility in Oak Ridge, Tennessee. This full-time position offers an exciting opportunity to contribute to the design and construction of pivotal nuclear facilities.Key ResponsibilitiesSupport the nuclear aspects related to the design and construction of the…

Join Gem Technologies as a Nuclear Safety Engineer and play a vital role in ensuring the safety and compliance of nuclear operations. You will be responsible for assessing safety protocols, conducting risk assessments, and collaborating with multidisciplinary teams to enhance safety measures.

Join Navarro Research and Engineering as a Project Engineer in Oak Ridge, TN, where you will provide essential Project Engineering support and coordination for a diverse range of projects, including but not limited to Commercial, Infrastructure, Production Modernization, and Production Stockpile initiatives. You will play a pivotal role in the planning, design, and implementation of advanced machine tools and necessary infrastructure upgrades.Your technical expertise will guide and lead multi-disciplined engineering teams in high-profile plant initiatives, ensuring compliance with ASME Nuclear Quality Assurance (NQA-1) standards within nuclear facilities. You will be responsible for planning and directing engineering activities, establishing detailed project scopes, budgets, schedules, and coordinating efforts with Production, Maintenance, Project Management, Construction, Startup, and Project Controls personnel. Additionally, you will monitor project progress against approved schedules and implement corrective actions as necessary.Navarro Research and Engineering is an award-winning federal contractor committed to partnering with clients to propel clean energy and provide solutions to complex challenges in the nuclear and environmental fields. By joining Navarro, you will be part of an exceptional team that prioritizes quality and safety while pursuing innovative strategies that enhance value for client success. Navarro, headquartered in Oak Ridge, Tennessee, has active programs nationwide for DOE/NNSA, NASA, and the Department of Defense.

Join our team at Radiant Industries as we embark on a groundbreaking project to establish an advanced nuclear manufacturing facility in Oak Ridge, Tennessee. We are in search of a dynamic Construction Manager / Owner’s Representative who will take charge of on-site execution, ensuring that ambitious schedules and innovative design concepts translate into tangible results.This role is integral to our startup, serving as a player-coach rather than a passive overseer. The ideal candidate excels in fast-paced, uncertain environments, is adept at making immediate field decisions, and possesses the assertiveness to drive contractors, designers, and internal teams towards successful project delivery.This position is designed with flexibility, allowing the individual to focus on capital projects and upcoming construction phases or to progress into a leadership role in site facilities and operations post-construction.Key ResponsibilitiesOwner’s Representative & Field ExecutionAct as the primary onsite authority for ownership throughout the construction phases, ensuring safety and quality standards are maintained.Maintain a constant field presence, driving execution across general contractors, subcontractors, and vendors.Hold contractors accountable for adherence to schedules, workforce allocations, sequencing, and quality benchmarks.Proactively identify and resolve issues to mitigate impacts on timelines and costs.Manage RFIs, submittals, pay applications, and change orders with an emphasis on efficiency and clarity.Schedule-Driven DeliveryOversee daily schedule awareness and short-term planning.Utilize creative problem-solving techniques to recover lost time and safeguard critical path activities.Support cost tracking and change management, understanding the interplay between schedule, scope, and cost.Ensure that inspections, testing, and commissioning are sequenced to prevent delays.Design Interface & Future PhasesEngage actively in design discussions for future construction phases, expansions, or additional facilities.Provide practical feedback to design teams based on in-field conditions regarding constructability and sequencing.Utilize lessons learned from current construction to enhance future designs, scopes, and execution strategies.

Join the innovative team at Navarro Research and Engineering as a Structural Engineer in Oak Ridge, TN. We are an award-winning federal contractor focused on developing clean energy solutions and tackling complex challenges in the nuclear and environmental sectors.At Navarro, we pride ourselves on our commitment to quality and safety, while continuously seeking innovative strategies to enhance client success. Headquartered in Oak Ridge, Tennessee, we support a variety of programs across the nation for esteemed clients such as the DOE/NNSA, NASA, and the Department of Defense.As a Structural Engineer, you will play a pivotal role in creating high-quality design packages, providing engineering procurement and field support, and offering technical assessments of plant facilities. Your responsibilities will include preparing conceptual engineering deliverables, such as cost estimates, design criteria, and detailed design documents. You will collaborate with an integrated project team, contribute to multi-discipline tasks, and engage with system engineers and plant customers.This position demands technical expertise and a comprehensive understanding of Structural Engineering principles, codes, and standards. Key responsibilities include building evaluations, seismic analyses, overseeing outside engineering firms, and ensuring robust design of steel and concrete structures. Proficiency in developing structural drawings and conducting structural calculations is essential. Familiarity with CAD drafting and 3D modeling, particularly using STAAD.Pro, is preferred.The ideal candidate will demonstrate the ability to plan, self-perform, and direct engineering design activities, ensuring alignment with project scope, timelines, and requirements.

Navarro Research and Engineering is seeking a skilled Electrical Engineer specializing in Instrumentation and Controls to join our dynamic team in Oak Ridge, TN.As a recognized leader in the federal contracting space, Navarro is dedicated to driving advancements in clean energy and delivering innovative solutions to complex challenges within the nuclear and environmental sectors. By joining our team, you will be part of a collaborative environment that prioritizes quality, safety, and creative problem-solving to ensure our clients' success. Our headquarters in Oak Ridge, Tennessee allows us to serve various programs across the nation, including partnerships with DOE/NNSA, NASA, and the Department of Defense.In this role, you will play a vital part in developing high-quality design packages, providing engineering procurement, and offering field technical support to implement these designs. You will leverage your expertise to troubleshoot and assess plant systems effectively.Your responsibilities will include creating conceptual engineering deliverables, cost estimates, statements of work, design criteria, and detailed design engineering outputs such as calculations, construction specifications, and equipment specifications. You will also conduct walkdowns of existing plant facilities to generate design documents and support craft personnel in the field.Electrical Engineers at Navarro apply their extensive technical knowledge and a broad range of engineering principles with a focus on instrumentation and controls for equipment process monitoring and control. You will be expected to develop self-performed technical solutions to various challenges by adhering to established engineering practices, codes, and standards.In addition, you will be responsible for preparing conduit and cable schedules, equipment plans, one-line diagrams, wiring and connection schematics, loop diagrams, sections, elevations, details, calculations, datasheets, and construction specifications. You will also create control cabinet assembly drawings and system diagrams, developing control logic for both batch and continuous processes utilizing conventional analog instrumentation, distributed digital control systems, and PLC/HMI technologies. Additionally, you will assist in developing process control narratives and input for Process and Instrumentation Diagrams (P&IDs).

Prosidian Consulting is seeking a highly knowledgeable Nuclear Energy Subject Matter Expert (SME) to join our dynamic team in Oak Ridge, Tennessee. This role is perfect for individuals with deep expertise in nuclear energy systems, regulations, and technologies. As an SME, you will provide strategic guidance and insights to enhance our consultancy services and ensure compliance with industry standards.

JOIN OUR TEAMGem Technologies, Inc. is excited to invite applications for the position of Electrical Instrumentation & Controls Engineer to support the renowned Oak Ridge National Laboratory (ORNL) in Oak Ridge, Tennessee. This is a full-time opportunity to be part of a dynamic and innovative engineering team.Key ResponsibilitiesDesign and develop system architectures for new installations and upgrades for high-flux isotope reactor (HFIR) structures, systems, and components (SSCs).Conduct comprehensive calculations and technical analyses to enhance design development and validation processes.Ensure compliance with applicable codes and standards, including DOE Orders, ICC, IEEE, and nuclear standards.Draft and prepare design specifications along with establishing acceptance criteria for component enhancements.Revise material specifications and oversee procurement of materials critical to nuclear safety in alignment with regulatory mandates.Implement design modifications in line with configuration control processes and procedures established by RRD.QualificationsEducation & Experience – A Bachelor's Degree in Electrical Engineering or a related field, with at least 6 years of experience in DOE nuclear facilities, naval nuclear environments, or commercial nuclear plants.Citizenship – Applicants must be U.S. citizens due to the federal nature of the work.Clearance – Candidates must be able to obtain and maintain a government-issued security clearance if required.A thorough understanding of nuclear technology, including reactor safety basis, design, and construction fundamentals.Expertise in analog and digital circuitry, electric circuit theory, and AC power distribution principles.Proficient in circuit simulation tools, AutoCAD, and PCB design software.Familiarity with HMI/PLC control systems software is a plus.Basic understanding of DOE Orders and Standards such as DOE O 420.1C, DOE STD 1189, and DOE STD 1073-2016.Experience with configuration management and engineering change control within a nuclear setting.

Join Our Team as a Structural Engineer!We are excited to invite a Structural Engineer to become a vital part of our team at the Oak Ridge National Laboratory (ORNL). This full-time role is based in the scenic Oak Ridge, Tennessee, where you will contribute to groundbreaking projects.Key Responsibilities:Conduct calculations and interpret industry codes to facilitate innovative design development.Assist in project management for the implementation of design modifications.Offer engineering support in the fabrication of HBRR components.Perform structural analysis and calculations to enhance tools used for hoisting and rigging operations.Ensure that structural specifications and drawings for HFIR are prepared in compliance with relevant DOE and industry standards.Interpret and apply DOE Natural Phenomena Hazard codes and regulations, along with nuclear facility structural material design codes, including ASCE 4, ACI 349, and AISC N690.Execute seismic qualifications, analyses, and evaluations as per DOE-STD-1020 and -021 and the International Building Code.Draft detailed work package instructions to effectively document and perform tasks.Provide technical support in the field to craft supervisors as necessary.Ensure engineering design documents and drawings are completed and managed under RRD Configuration Management protocols.

ABOUT THE ROLEJoin the dynamic team at gem-technologies, where we are looking for a dedicated Mechanical Engineer to support the operations at the esteemed Oak Ridge National Laboratory (ORNL) in Oak Ridge, Tennessee. This full-time position offers the opportunity to contribute to critical engineering projects within a leading research facility.Key ResponsibilitiesUtilize your engineering skills to enhance the operations of the High Flux Isotope Reactor (HFIR).Design and develop engineering solutions for new installations, as well as upgrades and replacements of HFIR structures, systems, and components (SSCs).Conduct detailed calculations and analyses to comply with design specifications and requirements.Implement relevant industry codes and standards, including ASTM, ASME Boiler and Pressure Vessel Code, ASME B31 piping codes, NQA-1, and AWS.Assist in the development of plans for reactor core component replacements.Draft design specifications and establish acceptance criteria for component upgrades.Revise material specifications and offer technical support for material sourcing.Execute modifications in line with RRD configuration control protocols.QualificationsEducation & Experience – A Bachelor’s Degree in Mechanical Engineering, Nuclear Engineering, or a related field, combined with a minimum of 10 years of experience in Department of Energy (DOE) nuclear facilities and/or commercial nuclear plants.Citizenship Requirement – Only U.S. citizens will be considered due to the federal nature of this role.Security Clearance – Candidates must be eligible to obtain and maintain a government-issued clearance if required.Demonstrated proficiency in engineering design and manufacturing practices, including welding, joining techniques, and machine design.Understanding of DOE Orders and Standards (e.g., DOE O 420.1C, DOE STD 1189, DOE STD-1073 2016).Ability to read and interpret mechanical design drawings and apply GD&T principles (ASME Y14.5).Experience in configuration management and engineering change control processes within a nuclear environment.Preferred SkillsFamiliarity with AutoPIPE and finite element analysis is advantageous.

Join Navarro Research and Engineering as a Senior Mechanical Engineer in Oak Ridge, TN. We are a distinguished federal contractor committed to advancing clean energy and providing innovative solutions for complex challenges in the nuclear and environmental sectors.At Navarro, we pride ourselves on our exceptional team that emphasizes quality and safety. We are actively involved in projects across the nation for the Department of Energy (DOE), National Nuclear Security Administration (NNSA), NASA, and the Department of Defense.In this pivotal role, you will engage in engineering process development and testing activities to enhance the manufacturing of gas centrifuges for the enrichment of UF6. The ideal candidate is experienced in engineering processes and possesses knowledge in areas such as rotordynamics, dynamic testing, signal processing, and software development.

Join the innovative team at Navarro Research and Engineering as a Senior Mechanical Design Engineer in Oak Ridge, TN. We are an award-winning federal contractor committed to advancing clean energy and providing effective solutions for complex challenges in the nuclear and environmental sectors.At Navarro, you will be part of a dedicated team that values quality, safety, and innovative strategies aimed at enhancing client success. With our headquarters located in Oak Ridge, Tennessee, we have active programs with the Department of Energy (DOE/NNSA), NASA, and the Department of Defense across the nation.We are looking for a Senior Mechanical Design Engineer who excels in the design and optimization of piping and mechanical systems in process-control environments managing liquids or gases. This pivotal role requires extensive knowledge in fluid dynamics, equipment specification, and structural analysis. You will take the lead in system design innovation with minimal supervision, ensuring all projects align with operational, regulatory, and safety objectives from inception to completion.

Navarro Research and Engineering is actively seeking a skilled Radiological Control Technician to join our team in Oak Ridge, TN. An active DOE Q Clearance is a prerequisite for this position.As an award-winning federal contractor, Navarro is dedicated to collaborating with clients to drive clean energy initiatives and provide innovative solutions to complex challenges in the nuclear and environmental sectors. By joining Navarro, you will become part of an exceptional team dedicated to quality and safety, continually striving for innovative ways to enhance client success. Based in Oak Ridge, Tennessee, our company has ongoing programs nationwide for DOE/NNSA, NASA, and the Department of Defense.In this role, you will monitor personnel, work areas, and items exiting radiological zones to manage exposure to internal and external radiation sources. You will recommend suitable monitoring devices, protective gear, and optimal working durations for personnel engaged with radiation sources. Your responsibilities will include observing processes, reading and recording data from radiation detection instruments, and conducting air and bioassay sampling. You will investigate any results that exceed established standards and limits. Additionally, you will calibrate instruments, operate automated low background counting equipment, process TLDs, and execute lung counts. Your involvement in the planning phase of new work processes will also be essential, and you will serve as a vital member of the emergency response organization.Special Knowledge and Training:This role requires DOE RCT standardized CORE training certification. You should possess the capability to perform mathematical operations and conversions to articulate sampling and monitoring results accurately. A solid understanding of the principles, methods, and mechanics of monitoring and sampling radiological hazards is essential, as is the ability to recognize and address issues related to standards and limits, plan investigative actions, and define corrective measures.Requirements:Applicants should hold an Associate's degree or higher in a technical field, coupled with 2-5 years of relevant experience; alternatively, a high school diploma with 5-12 years of relevant experience is acceptable. Preferred candidates will have an Associate's degree or higher in a technical field along with 10 to 15 years of related experience, or a high school diploma with 20 or more years of relevant experience. Demonstrated in-depth knowledge and skills in a technical specialty are required. This position may involve leading other technicians by planning and directing their work.Due to stringent government contract requirements, U.S. citizenship is mandatory.Navarro is an equal-opportunity employer. All qualified applicants will be given consideration for employment without regard to sex, race, religion, color, or other protected characteristics.

Join Our Team as a Manufacturing & Fabrication EngineerGem Technologies is excited to announce an opening for a Manufacturing & Fabrication Engineer to support the Oak Ridge National Laboratory. This full-time role is based in Oak Ridge, Tennessee, and offers a unique opportunity to contribute to innovative projects in the engineering field.Your Responsibilities:Perform detailed calculations and analyses to support design specifications and requirements.Ensure adherence to relevant codes and standards, including ASTM, ASME, AWS, GD&T, QS9000, and ISO14001.Assist in the development of reactor core component replacement and core alignment plans.Prepare material specifications and provide technical support for procurement activities.Oversee the procurement and fabrication processes for critical reactor vessel components.Ensure fabrication packages comply with RRD Fabrication Control, SEP-0240.Manage documentation and engineering drawings for fabrication components, ensuring compliance with RRD Configuration Management, SEP-0100.Provide design support and review drawings to enhance manufacturability.Develop and review design specifications to establish acceptance criteria for component fabrications.Collaborate with vendors and personnel to create testing and inspection plans.Conduct vendor visits to witness tests and carry out in-process inspections.Document and resolve any nonconformance or deviations identified during the fabrication process.

Join Navarro Research and Engineering as an Instrumentation & Controls (I&C) Engineer (3833) in Oak Ridge, TN. We are an award-winning federal contractor dedicated to collaborating with clients to foster clean energy solutions and tackle complex challenges in nuclear and environmental sectors. At Navarro, you will be part of a distinguished team that values quality and safety, while continuously seeking innovative strategies to enhance client success. With our headquarters in Oak Ridge, Tennessee, we run active programs nationwide for DOE/NNSA, NASA, and the Department of Defense.As an Instrumentation & Controls (I&C) Engineer, you will spearhead and support intricate process control engineering initiatives, including digital control systems, test stands, and chemical process systems. This role encompasses the entire engineering lifecycle—from identifying problems to design, implementation, testing, and commissioning—while advocating for data-driven decision-making, automation, and disciplined configuration management. This position demands a blend of hands-on technical execution and leadership, along with vendor coordination and effective client engagement.

Join Navarro Research and Engineering as an Electrical Engineering Designer in Oak Ridge, TN. Applicants must possess an active DOE Q clearance to be considered for this role.Navarro Research & Engineering, an award-winning federal contractor, is committed to collaborating with clients to promote clean energy and deliver innovative solutions to complex challenges in the nuclear and environmental sectors. By joining Navarro, you become part of a dedicated team that prioritizes quality and safety while continuously exploring innovative strategies to enhance client success. With our headquarters located in Oak Ridge, Tennessee, Navarro actively engages in several programs across the nation with partners such as DOE/NNSA, NASA, and the Department of Defense.Key responsibilities include drafting in Bentley MicroStation, creating one-line diagrams, wiring diagrams, lighting and power plans, installation details, Instrumentation and Controls Diagrams, conduit and cable schedules, as well as fire alarm and communication drawings. Candidates should have experience with low and medium voltage power distribution and industrial control systems, along with familiarity with NFPA 70, NFPA 79, and UL508A standards. Additionally, you will be responsible for preparing data sheets, specifications, and walkdown reports, working collaboratively with electrical engineers and other CAD drafters within the same team. Supporting construction and operational activities related to design outputs is vital, and field walkdowns may be required in radiologically contaminated areas.

Navarro Research and Engineering is seeking a skilled Piping Engineer to join our team in Oak Ridge, TN. An active DOE Q Clearance is mandatory for consideration.As an award-winning federal contractor, Navarro is committed to driving clean energy solutions and addressing complex challenges in the nuclear and environmental sectors. Becoming a part of Navarro means collaborating with an exceptional team focused on quality, safety, and innovative strategies that enhance client success. With our headquarters in Oak Ridge, Tennessee, we support various programs nationwide for DOE/NNSA, NASA, and the Department of Defense.Key Responsibilities:Provide comprehensive piping design engineering support for modifications within Cat 2 and Cat 3 facilities.Develop design output documentation including drawings, engineering instructions, data sheets, equipment specifications, equivalency evaluations, calculations, etc.Conduct pipe stress analysis; familiarity with AutoPipe is advantageous.Design in accordance with ASME B31.3 and ASME B31.1 standards.Collaborate with other engineering disciplines and plant organizations to ensure timely delivery of design outputs.Experience in NRC or DOE regulated environments is preferred.Understand Conduct of Engineering, Operations, and Maintenance in nuclear regulated settings.Exhibit excellent verbal and written communication skills, effectively interacting with clients, production teams, management, and staff.Willingness to perform field walk-downs and work in a production environment.

Role Overview Gem Technologies, Inc. is seeking a Technical Lead Engineer for its Oak Ridge, TN (Y-12) location. This position guides a team of engineers through complex projects and helps shape technology solutions for clients. The Technical Lead Engineer plays a key role in upholding quality standards and client service. What You Will Do Lead technical discussions and provide direction to engineering teams Monitor progress to ensure project milestones are achieved Encourage collaboration and support continuous improvement within the team Promote innovation in project approaches and solutions

Join our dynamic team at Gem Technologies as an HVAC Design Engineer, where you will play a crucial role in creating innovative heating, ventilation, and air conditioning solutions. Your expertise will contribute to a variety of projects, enhancing building efficiency and comfort.

Join our dynamic team at Navarro Inc. as a Fire Protection Design Engineer, where you'll play a crucial role in ensuring the safety and integrity of various projects. This position is ideal for individuals who are passionate about fire protection engineering and are eager to contribute to innovative design solutions.